orifice|orifices

医生用棉签清洁了耳道口。

The doctor cleaned the ear's ___orifice with a cotton swab.

这些昆虫会通过植物的自然孔口进入内部。

These insects enter through the natural ___orifices of the plant.

检查一下吸尘器的孔有没有被灰尘堵住。

Check if the ___orifice of the vacuum cleaner is blocked by dust.